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Embracing wireless interference: analog network coding

ABSTRACT Traditionally, interference is considered harmful. Wireless networks strive to avoid scheduling multiple transmissions at the same time in order to prevent interference. This paper adopts the opposite approach; it encourages strategically picked senders to interfere. Instead of forwarding packets, routers forward the interfering signals. The destination leverages network-level information to cancel the interference and recover the signal destined to it. The result is analog network coding because it mixes signals not bits. So, what if wireless routers forward signals instead of packets? Theoretically, such an approach doubles the capacity of the canonical 2-way relay network. Surprisingly, it is also practical. We implement our design using software radios and show that it achieves significantly higher throughput than both traditional wireless routing and prior work on wireless network coding.

Sanity check: The 700 MHz auction will tip the wireless balance, but in which direction?

these two are also likely to delay the move to open platforms.

AT&T and Verizon would ultimately slow the growth and adoption of the mobile Internet if either of them won 700 MHz Class C.

Intel seeks wireless unification

The two competing 4G wireless systems, Wimax and Long Term Evolution (LTE), should be united, according to Intel.

Vodafone chief executive Arun Sarin said he believed the two standards could be brought together.

Mobile Carriers See Gold in Femtocells If consumers buy in to private wireless phone networks, the industry could save money.

Strong cell signals at home are certainly a plus, but it's not clear how much consumers will pay for this, analysts say.

Sprint, one of the first companies to start commercial trials of the products, is offering them to consumers in Denver and Indianapolis for $50 apiece, along with an offer of lower-priced calling plans--altogether a substantial subsidy.

OFDM-based Wireless BroadBand System Simulator

FCC Approves 214 Bidders For Wireless Auction

Rebirth of WiMAX Super Network = Death of Cellphone? Buzzword

Everything You Always Wanted to Know About the 700-MHz Auction but Were Afraid to Ask: Expert Op-Ed

America’s mobile phone oligopoly

700-MHz signals propagate better, spreading farther and penetrating buildings more easily than higher frequencies

You have to understand that this is a horrible environment for a radio channel. There’s interference, all sorts of multipath and an infinite number of different path loss issues.

provide similarly marginal signal levels, add a bit of interference from other nearby base stations, throw in some fading, and throughput will drop substantially

how well it lends itself to assuring that such optimal conditions are more the norm than the exception

IEEE 802.16 Task Group m (TGm)

IEEE C802.16m-08/24216jm Ad Hoc Group Report (Rakesh Taori and Peiying Zhu; 2008-03-16)

IEEE C802.16m-08/257r1Further comparison of pilot patterns (Yuval Lomnitz, Huaning Niu, Jong-Kae (JK) Fwu, Sassan Ahmadi, Hujun Yin; 2008-03-21) IEEE C802.16m-08/257Further comparison of pilot patterns (Yuval Lomnitz, Huaning Niu, Jong-Kae (JK) Fwu, Sassan Ahmadi, Hujun Yin; 2008-03-20)

3GPP Specification series

Opportunity Driven Multiple Access (ODMA)

TS 25.224 Physical layer procedures (TDD)

C80216m-08_257r1.ppt (size: 142.3 KB last modified: 2008-03-21 )Further comparison of pilot patterns| Yuval Lomnitz, Huaning Niu, Jong-Kae (JK) Fwu, Sassan Ahmadi, Hujun Yin| Intel Corp [updated channel models]

C80216m-08_253r1.pdf (size: 320.8 KB last modified: 2008-03-20 )Simulation Results for Several of the Proposed Pilot Format Designs in IEEE 802.16m| Fred Vook, Tim Thomas, Mark Cudak| Motorola

a modular mobile phone

3GPP Specifications - Numbering scheme

3GPP Specification series

TS 36.201 Evolved Universal Terrestrial Radio Access (E-UTRA); Long Term Evolution (LTE) physical layer; General description . TS 36.211 Evolved Universal Terrestrial Radio Access (E-UTRA); Physical channels and modulation . TS 36.212 Evolved Universal Terrestrial Radio Access (E-UTRA); Multiplexing and channel coding . TS 36.213 Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures . TS 36.214 Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer - Measurements . TS 36.300 Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access (E-UTRAN); Overall description; Stage 2

network neutrality issue

It's all part of Google's attempt to feel at home in the nation's capital.

Space-Time Block Codes Simulation

www.3gpp.org - /ftp/tsg_ran/WG1_RL1/TSGR1_46bis/Docs/

Published August 20, 2004